PHP Numbers

One thing to notice about PHP is that it provides automatic data type conversion.

So, if you assign an integer value to a variable, the type of that variable will automatically be an integer. Then, if you assign a string to the same variable, the type will change to a string.

PHP Integers

2, 256, -256, 10358, -179567 are all integers.

An integer must result in a whole number
An integer must be at least one digit (0-9)
An integer cannot contain decimal point or commas

PHP Floats

A float (floating point number) is a number with a decimal point or a number in exponential form.

2.0, 256.4, 10.358, 7.64E+5, 5.56E-5 are all floats.

PHP Infinity

A numeric value that is larger than PHP_FLOAT_MAX is considered infinite.